Remote Keyless Entry Receiver System Inspection

WARNING: This page is about a different car, the 2004 Nissan Armada. However, it is still accessible from the selected car via links, so may be relevant.

REMOTE KEYLESS ENTRY RECEIVER POWER SUPPLY CIRCUIT INSPECTION
1. Disconnect remote keyless entry receiver connector.
2. Check voltage waveform between remote keyless entry receiver connector terminal 4 and ground using an oscilloscope.
  
  Fig 1: Displaying Waveform
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 2: Checking Voltage Waveform Between Remote Keyless Entry Receiver And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK >> GO TO 2.
2. NG >> GO TO 3.
REMOTE KEYLESS ENTRY RECEIVER GROUND CIRCUIT INSPECTION
Check continuity between remote keyless entry receiver connector terminal 1 and ground.

Fig 3: Checking Continuity Between Remote Keyless Entry Receiver And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

1 - Ground : Continuity should exist.

OK or NG
1. OK >> GO TO 3.
2. NG >> GO TO 4.
REMOTE KEYLESS ENTRY RECEIVER OUTPUT SIGNAL INSPECTION
1. Connect remote keyless entry receiver connector.
2. Check voltage waveform between remote keyless entry receiver connector terminal 2 and ground using an oscilloscope.
  
  Fig 4: Displaying Voltage Waveform
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 5: Checking Voltage Waveform Between Remote Keyless Entry Receiver Connector And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK >> Remote keyless entry receiver system is OK.
2. NG >> GO TO 4.
HARNESS CONTINUITY INSPECTION
1. Disconnect remote keyless entry receiver and BCM connectors.
2. Check continuity between receiver connector M120 terminals 1, 2, 4 and BCM connector M18 terminals 18, 19, 20.
  1-18 : Continuity should exist.
  
  2-20 : Continuity should exist.
  
  4-19 : Continuity should exist.
  
  Fig 6: Check Continuity Between Receiver And Bcm
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check continuity between remote keyless entry receiver terminals 1, 2 and 4 and ground.
  1 - Ground : Continuity should exist.
  
  2 - Ground : Continuity should not exist.
  
  4 - Ground : Continuity should not exist.
OK or NG
1. OK >> System is OK.
2. NG >> Repair the harness between the remote keyless entry receiver and BCM.